DownClock
Transfer time calculator
1,99 USD · Designed for iPad. Not verified for macOS.
Ever wondered exactly how long a 4K video will take to upload, or whether your new ISP plan is actually faster? DownClock gives you an instant, accurate answer.
Enter a file size (KB to TB, binary or SI), pick your connection speed from common presets or type your own, and watch the result roll in — days, hours, minutes, seconds.
Built for developers, IT admins, content creators, and anyone comparing ISP plans. No ads. No accounts. No nonsense.
FEATURES
- File sizes from KB to TB — binary (KiB/GiB) and SI units
- Speed presets: 1 Mbps to 10 Gbps
- Compare two ISP providers side by side
- Calculation history
- Protocol overhead slider (TCP/IP + HTTP)
- ISP efficiency slider (advertised vs. actual speed)
- Animated rolling-digit result display
- Light, dark, or system appearance
- iPhone and iPad — portrait optimized
- Zero network requests. Completely private.
Speed Test — measure your real download speed directly in the app, then instantly use it in your calculations.
The developer, Artem Trubitsyn, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Artem Trubitsyn
- Size
- 2.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Artem Trubitsyn
